Remember, the original stories upon which the allegations were based were based not only on hearsay but, in one instance, on the "testimony" of a soldier who wasn't even in Gaza.
The brigade commander’s findings were reported in the Israeli newspaper Maariv, in a story titled IDF Investigation Refutes the Testimonies About Gaza Killings. According to the story (translation by CAMERA):
Two central incidents that came up in the testimony, which Danny Zamir, the head of the Rabin pre-military academy presented to Chief of Staff Gaby Ashkenazi, focus on one infantry brigade. The brigade’s commander today will present to Brigadier General Eyal Eisenberg, commander of the Gaza division, the findings of his personal investigation about the matter which he undertook in the last few days, and after approval, he will present his findings to the head of the Southern Command, Major General Yoav Gallant.
Regarding the incident in which it was claimed that a sniper fired at a Palestinian woman and her two daughters, the brigade commander’s investigation cites the sniper: “I saw the woman and her daughters and I shot warning shots. The section commander came up to the roof and shouted at me, ?Why did you shoot at them.’ I explained that I did not shoot at them, but I fired warning shots.”
Officers from the brigade surmise that fighters that stayed in the bottom floor of the Palestinian house thought that he hit them, and from here the rumor that a sniper killed a mother and her two daughters spread.
The other alleged incident, the killing by a sniper of an elderly woman, also seems not to have taken place:
Regarding the second incident, in which it was claimed that soldiers went up to the roof to entertain themselves with firing and killed an elderly Palestinian woman, the brigade commander investigation found that there was no such incident.
Safian suggests that those newspapers that "gave these stories great play despite a clear lack of evidence, should be composing forthright corrections – preferably to be run on the front page."
Don't hold your breath Alex!